Capacities | Metering Orifice
8694A FLANGED ORIFICE METER CAPACITY TABLE (SCFH OF NATURAL GAS)
15.696 psia inlet pressure; 60 °F inlet temperature (1082 mbar inlet pressure; 15.6 °C inlet temperature)
Pressure drop across orifice plate ("w.c.)
Pipe size Plate No.
1
2
3
4
5
6
7
8
9
10
270 324 387 468 558 675 810 915 468 558 675 810
180 190 230 280 330 390 480 550
250 270 330 400 470 550 680 780 440 470 570 680 800 950 1180 1750 600 680 820 980 1160 1360
310 340 400 480 570 680 840 950 530 570 690 830 980 1160 1440 2150 730 830 1000 1200 1420 1670
360 390 460 560 660 780 970 1100 620 660 800 960
400 430 520 630 740 870
440 480 560 690 810 960 1180 1340 750 810 980 1180 1390 1640 2040 3040 1040 1180 1420 1700 2010 2360 2940 4260 1720 1730 2010 2440 2910 3420 4110 7120
470 510 610 740 870
500 550 650 790 930 1100 1370 1550
530 580 690 840 990 1170 1450 1650
560 610 730 890 1040 1230 1530 1740
1"
1030 1280 1450
1080 1230
310 330 400 480 570 670 830 1240 420 480 580 700 820 960 1200 1740
690 740 900 1080 1270 1500 1860 2770 950 1070 1290 1560 1830 2160 2690 3890 1570 1580 1830 2230 2650 3120 3760 6500
810 880 1060 1280 1500 1780 2200 3280 1120 1270 1530 1840 2170 2550 3180 4600 1860 1870 2170 2640 3140 3690 4440 7690
870 940 1130 1360 1610 1900 2360 3510 1200 1360 1640 1970 2320 2730 3400 4920 1990 2000 2320 2820 3360 3940 4750 8220
920 990 1200 1450 1700 2010 2500 3720 1270 1440 1740 2090 2460 2890 3600 5220 2110 2120 2460 2990 3560 4180 5040 8720
970
1050 1270 1520 1800 2120 2630 3920 11340 1520 1830 2200 2590 3050 3800 5500 2220 2240 2590 3150 3750 4410 5310 9190
1-1/4"
972 1160 1400 1890 675 810 972 1160 1400 1670 2000 2970 972 1160 1400 1670 2000 2400 2880 4810
1140 1340 1670 2480 850 960 1160 1390 1640 1930 2400 3480 1410 1420 1640 2000 2370 2790 3360 5810
1-1/2"
1700 2080 2460 3010
700 710 820
990
1220 1230 1420 1730
1000 1160 1410
2"
1000 1190 1390 1680 2910
1680 2050
1970 2380
2420 2910 5030
4110
Bulletin 8694A Page 5
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